IsNotNull
public void IsNotNull(string key);
Parameter
| Value | Type | Description | 
|---|---|---|
| key | string | Column's key value | 
Description
It is used to search the data whose key column data is not null.
The key must not begin with a number. If it does, a warning is displayed, and 'Where' is not added. 
Example
where.IsNotNull(string key);